A. Scanner
B. Modem/Router
C. Speaker
D. Projector

Explanation:

A modem or router is used to connect your device to the Internet. The modem receives the Internet connection from the service provider, and the router shares it with multiple devices through Wi-Fi or cables.

Without a modem or router, most homes and offices cannot access the Internet.

Key Points:

• Connects devices to the Internet
• Provides Wi-Fi access
• Used in homes, schools, and offices